/* ACY Connect FIX API Documentation - Professional Modern Design */
/* Inspired by Stripe, Tailwind CSS, and Material-UI documentation */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand Colors */
    --primary-yellow: #FDB913;
    --primary-yellow-light: #FECA57;
    --primary-yellow-dark: #E5A300;

    /* Neutrals - Enhanced for better readability */
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #E5E5E5;
    --gray-300: #D4D4D4;
    --gray-400: #A3A3A3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    /* Semantic Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFAFA;
    --bg-tertiary: #F5F5F5;
    --text-primary: #171717;
    --text-secondary: #525252;
    --text-tertiary: #737373;
    --border-light: #F5F5F5;
    --border-default: #E5E5E5;
    --border-strong: #D4D4D4;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Code Colors */
    --code-bg: #F5F5F5;
    --code-text: #E5484D;
    --code-border: #E5E5E5;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== TYPOGRAPHY ===== */
h1 {
    font-size: 48px;
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--text-primary);
}

h2 {
    font-size: 32px;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-top: 64px;
    margin-bottom: 16px;
    color: var(--text-primary);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
}

h2:first-child {
    margin-top: 0;
}

h3 {
    font-size: 24px;
    line-height: 1.3;
    font-weight: 600;
    margin-top: 40px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

h4 {
    font-size: 18px;
    line-height: 1.4;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

p {
    margin-bottom: 16px;
    line-height: 1.75;
    color: var(--text-secondary);
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--primary-yellow-dark);
}

strong {
    font-weight: 600;

}

/* ===== HEADER ===== */
.header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    height: 72px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1100;
    border-bottom: 1px solid var(--border-default);
    transition: box-shadow 0.2s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-container {
    height: 100%;
    max-width: 1920px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
}

.logo {
    height: 48px;
    width: auto;
    transition: opacity 0.2s ease;
}

.logo:hover {
    opacity: 0.8;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ===== BUTTONS ===== */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary-yellow);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-yellow-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-login {
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    font-weight: 500;
}

.btn-login:hover {
    color: var(--primary-yellow-dark);
    background-color: var(--gray-50);
}

/* ===== SIDEBAR NAVIGATION ===== */
.sidebar-toc {
    position: fixed;
    top: 72px;
    left: 0;
    width: 280px;
    height: calc(100vh - 72px);
    background: var(--bg-primary);
    border-right: 1px solid var(--border-default);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px 0;
    z-index: 900;
}

/* Custom Scrollbar */
.sidebar-toc::-webkit-scrollbar {
    width: 6px;
}

.sidebar-toc::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-toc::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

.sidebar-toc::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

.nav-item {
    margin: 2px 0;
}

.nav-item > a,
.nav-item > button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 450;
    color: var(--text-secondary);
    cursor: pointer;
    text-align: left;
    transition: all 0.15s ease;
    font-family: 'Noto Sans', sans-serif;
    text-decoration: none;
    border-left: 2px solid transparent;
    border-radius: 0;
}

.nav-item > a:hover,
.nav-item > button:hover {
    color: var(--text-primary);
    background-color: var(--gray-50);
}

.nav-item > a.active,
.nav-item > a.current-page {
    background-color: var(--gray-50);
    color: var(--primary-yellow-dark);
    font-weight: 500;
    border-left-color: var(--primary-yellow);
}

.nav-expand-icon {
    font-size: 10px;
    transition: transform 0.2s ease;
    display: inline-block;
    margin-left: 4px;
    color: var(--text-tertiary);
}

.nav-item.collapsed .nav-expand-icon {
    transform: rotate(-90deg);
}

.nav-children {
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.nav-children.collapsed {
    max-height: 0;
}

.nav-children .nav-item > a {
    padding-left: 36px;
    font-size: 13px;
}

/* ===== MAIN CONTENT ===== */
main {
    margin-top: 72px;
    margin-left: 280px;
    flex: 1;
    background: var(--bg-primary);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 64px 48px 80px;
}

.content-wrapper {
    max-width: 920px;
}

/* ===== TABLES ===== */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 32px 0;
    border: 1px solid var(--border-default);
    border-radius: 8px;
    overflow: hidden;
    font-size: 14px;
    box-shadow: var(--shadow-sm);
}

table th {
    background-color: var(--gray-50);
    font-weight: 600;
    text-align: left;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-default);
    color: var(--text-primary);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
    line-height: 1.6;
}

table tbody tr:last-child td {
    border-bottom: none;
}

table tbody tr {
    transition: background-color 0.15s ease;
}

table tbody tr:hover {
    background-color: var(--gray-50);
}

/* ===== CODE BLOCKS ===== */
code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 3px 6px;
    border-radius: 4px;
    border: 1px solid var(--code-border);
    font-weight: 500;
}

pre {
    background-color: var(--gray-900);
    color: #E4E4E7;
    padding: 24px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 32px 0;
    border: 1px solid var(--gray-800);
    box-shadow: var(--shadow-sm);
}

pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
    border: none;
    font-size: 14px;
    line-height: 1.7;
}

/* ===== LISTS ===== */
ul, ol {
    margin: 20px 0;
    padding-left: 28px;
}

li {
    margin-bottom: 10px;
    line-height: 1.7;
    color: var(--text-secondary);
}

li strong {
    color: var(--text-primary);
}

ul ul, ol ul, ul ol, ol ol {
    margin-top: 8px;
    margin-bottom: 8px;
}

/* ===== MERMAID DIAGRAMS ===== */
.mermaid-container {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: 12px;
    margin: 32px 0;
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-sm);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--gray-900);
    color: var(--bg-primary);
    padding: 64px 0 32px;
    border-top: 1px solid var(--gray-800);
    margin-top: auto;
    margin-left: 280px;
    flex-shrink: 0;
    width: calc(100% - 280px);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
}

.footer-columns {
    display: block;
    max-width: 640px;
    margin-bottom: 48px;
}

.footer-column h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    margin-top: 0;
    color: var(--bg-primary);
}

.footer-description {
    font-size: 14px;
    color: var(--gray-400);
    margin-bottom: 20px;
    line-height: 1.7;
}

.footer-risk {
    border-top: 1px solid var(--gray-800);
    padding-top: 32px;
    margin-top: 48px;
}

.footer-risk p {
    font-size: 12px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 12px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
    margin-top: 32px;
}

.footer-copyright {
    font-size: 13px;
    color: var(--gray-500);
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    color: var(--gray-400);
    font-size: 20px;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: var(--gray-800);
}

.footer-social a:hover {
    color: var(--primary-yellow);
    background-color: var(--gray-700);
}

/* ===== MOBILE MENU TOGGLE ===== */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
    font-size: 24px;
    order: -1;
    transition: color 0.2s ease;
}

.mobile-menu-toggle:hover {
    color: var(--primary-yellow-dark);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .sidebar-toc {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: var(--shadow-xl);
        z-index: 1000;
    }

    .sidebar-toc.open {
        transform: translateX(0);
    }

    main {
        margin-left: 0;
    }

    .footer {
        margin-left: 0;
        width: 100%;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .container {
        padding: 48px 32px 80px;
    }

    .header-container {
        padding: 0 24px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 28px;
        margin-top: 48px;
    }

    h3 {
        font-size: 22px;
        margin-top: 32px;
    }

    .container {
        padding: 32px 20px 64px;
    }

    .sidebar-toc {
        width: 280px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    table {
        font-size: 13px;
    }

    table th,
    table td {
        padding: 10px 12px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 32px;
    }

    h2 {
        font-size: 24px;
    }

    .container {
        padding: 24px 16px 48px;
    }

    .header-container {
        padding: 0 16px;
    }

    table {
        display: block;
        overflow-x: auto;
        border-radius: 6px;
    }

    .footer-container {
        padding: 0 20px;
    }

    .btn {
        font-size: 14px;
        padding: 8px 16px;
    }
}

/* ===== LANDING PAGE SPECIFIC ===== */
.hero {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--bg-primary) 100%);
    padding: 80px 0 64px;
    border-bottom: 1px solid var(--border-default);
}

.hero h1 {
    font-size: 56px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 720px;
    margin-bottom: 32px;
}

.doc-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.doc-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: 12px;
    padding: 32px;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.doc-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-yellow);
    transform: translateY(-2px);
}

.doc-card h2 {
    font-size: 24px;
    margin: 0 0 12px 0;
    padding: 0;
    border: none;
    color: var(--text-primary);
}

.doc-card p {
    font-size: 15px;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== UTILITY CLASSES ===== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .sidebar-toc,
    .footer,
    .mobile-menu-toggle {
        display: none;
    }

    main {
        margin-left: 0;
        margin-top: 0;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}